Percolator.



R. 0. BINGHAM.

PERCOLATOR.

APPLICATION FILED MAY2591915- ]Patented Jilly 2, 1918.

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Specification of Letters Patent.

Patented July 2, rain.

Application filed ma 25, 1915. Serial No. 30am.

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Be it known that .1, ROBERT O. Brennan, a citizen of the United States, and a resident of Sidney, county of Shelby, and State of Ohio,have invented a new and useful Improvement in Percolatoraof which the following is a specification, the principle of the inventionbeing herein explained and the best mode in which I havelcontemplated applying that principle, so as to distinguish it from other inventions.

The present improvements relate in general to percolators and moreparticularly to improvements in the method of attachment of the removable cover of the perc'ol-ator to the top of the same. in the usual type of percolator the removable cover cannot be fastened securely to the hinged top, causing accidents and being a source of considerable annoyance to the user and the present device is intended to remedy this objection. To the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings-:

Figure l is a vertical section through a percolator constructed in accordance with my invention; Fig.2 is a v ew in perspective of the hinged top in inverted position; Fig. 3 is a bottom plan view of the glass cover; and Fig. 4 is a view in perspective of the split ring used in connection with the cover and top.

The general construction and operation of such a device are too well known to require detailed description, it being sufiicient to state that the body 1 of the percolator'may be of any desired form, being here shown as similar to a conventional cofiee pot in its general external appearance, and being provided with a handle 2 and a pouring spout 3. Into the top of the body there is set a coffee-receiving chamber or cup 4, which is provided with a plurality of small apertures in the bottom for permitting the water to pass through into the body 9f the percolator. Centrally mounted in the coffee-receiving chamber is a tube :5 provided with a plurahty of apertures Bat its top and into this tube there extends theupper end of a cen-.

trally disposed circulation tube 7.

Hinged to the topof the percolator body 1 is a cover 15 provided with a central aperture 16 which has one or more recesses 17 in the form of semi-cylindrical openings. At some point around the periphery of the aperture 16 cams 18 are provided upon the under surface of the cover and adjacent to these Cams there are formed seats or sockets 1.9. The top which will cover the opening 1 6, is preferably of glass, as is customary in most types of percolators, and is provided with one or more lugs 20 such lugs corresponding in position with the positions of the openings 17 in the cover 15. Preferably there are two openings in this cover at opposite points,and there will therefore be two lugs 20 on the top also placed diametrically opposite each other. Above these lugs 20 the top is provided with a circmnferential flange 21 which will preferably be rounded or tapered from its lower side to the upper and will be spaced a short distance above the lugs 20. Beneath the flange 21 but above the lugs 20 there will be placed upon the top a helical resilient flared ring 22..

In order to place the top in position, the lugs 20 are placed above the openings 17 when the top may be set into the cover. The top is then turned until the lugs 20 engage on their upper surfaces with the surfaces of the cams 18, thus forcing the top inwardly and pressing the split ring 22 up the inclined or tapered face of the flange 21. The engagement between the top and cover will be thus seen to be, at least at the start, a form of bayonet joint connection. By reason of the helical form of this ring it is placed in an abnormal position and resiliently presses upward resisting the down ward pressure caused by the lugs 20 riding up on the cams 18. When these lugs have reached the highest point on the cams, further rotation of the top will cause the lugs to drop into the sockets 19 and the resiliency of the ring will then maintain the top in that position, and some slight force must be exerted by the user before the top can be rotated back to the position in which the lugs register with the sockets 17, when the top may be removed. The resistance to movement of the glass cover, while not great, is sufficient to effectively prevent accidental rotation, although the user can readily remove the same when desired.

It will be obvious that other means than the split ring may be used to secure the resilient or frictional pressure acting against the top and the cover to maintain the same in any desired relation, such for example as the locking relation when the lugs are engaged in the seats 19. 7

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the'following claims or the equivalent of such stated means be employed.

I therefore particularly point out and distinctly claim as my invention 1. In a percolator, the combination of a top having a circular opening therein and a'recess along one side of such opening, a cover adapted to fit into such opening and having a lug adapted to pass through such recess, a flange on said cover adjacent said top, a cam on the lower surface of said top adapted to be engaged by said lug upon rotation of said cover and to thereupon draw said cover inward, and a resilient ring mounted on said cover between said flange and said top and adapted to frictionally press against said flange to prevent rotation of said cover.

2. In a percolator, the combination of a top having a circular opening therein and a recess along one side of such opening, a cover adapted to fit into such opening and having a lug adapted to pass through such recess, a flange on said cover adjacent said top, a

cam on the lower surface of said top adapted to be engaged by said lug upon rotation of said cover and to thereupon draw said cover inward, a socket adjacent to said cam to receive said lug upon continued rotation of said cover, and a helical resilient split ring mounted on said cover between said flange and said top and adapted to frictionally press against said flange to prevent rotation of said cover.

3. In a percolator, the combination of a top having a circular opening therein and a recess along one side of such opening, a cover adapted to fit into such opening and having a lug adapted to pass through such I recess, a tapered flange on said cover adjacent said top, a cam on the lower surface of said top adapted to be engaged by said lug upon rotation of said cover and to thereupon draw said cover inward, a socket adjacent to said cam to receive said lug upon continued rotation of said cover, and a helical, resilient split ring mounted on said cover between said flange and said top and adapted to frictionally press against said flange to prevent rotation of said cover.

4. In a percolator, the combination of a top having a circular opening therein and spaced recesses along its sides, a cover adapted to fit into such opening and having lugs adapted to pass through such recesses, a tapered flange on said cover adjacent said top, cams on the lower surfaces of said top adapted to be engaged by said lugs upon rotation of said cover and to thereupon draw said cover inward, sockets adjacent to said cams for receiving said lugs upon continued rotation of said cover, and a helical, resilient split ring mounted on said cover between said flange and said top and adapted to frictionally press against said flange to prevent rotation of said cover.

Signed by me, this 21st day of May, 1915.

ROBERT O. BINGI-IAM.

Attested by HARRY K, Hess, W. H. WAGNER.

Copies of this patent may be obtained for flve cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

